The surging San Francisco 49ers are hitting their stride at the right time, and that's what really matters to the young quarterback.

Kaepernick threw touchdown passes to Vernon Davis and Michael Crabtree, then led a long, clock-exhausting, fourth-quarter drive that produced a field goal to help the defending NFC champions pull away from the Tampa Bay Buccaneers 33-14 on Sunday.

The third-year pro's inconsistency has been an issue this season, however he protected the football and hurt the Bucs (4-10) with his feet as well as his arm in helping the 49ers extend their winning streak to four games.

Davis caught a TD pass for the fifth straight game and Michael Crabtree scored his first TD since returning from injury for San Francisco (10-4). Frank Gore rushed for 86 yards to go over 1,000 in a season for the seventh time.

"Frank's an amazing running back. I feel like he's the most underrated running back in the NFL. He does everything for our offense," Kaepernick said. "He runs the ball. If we ask him to block, he does it. If we ask him to catch a pass, he does it. What he means to this team and what he contributes really can't be quantified."

Gore carried 22 times, hiking his season rushing total to 1,017 yards.

"It's a blessing. Ninth year in the league. Every year I hear the doubters, you know, 'Can you still do it?'" Gore said. "I take it one year at a time. My coaches still believe in me. This organization still believes in me."

San Francisco 49ers quarterback Colin Kaepernick (7) throws a pass against the Tampa Bay Buccaneers during the first quarter of an NFL football game, Sunday, Dec. 15, 2013, in Tampa, Fla. (Brian Blanco, Associated Press)

The 10-minute drive Kaepernick led to one of Phil Dawson's four field goals and steadied the 49ers after Tampa Bay pulled within 20-14. Kendall Hunter put it well out of reach, scooping up a fumble on the ensuing kickoff and diving 2 yards into the end zone for a touchdown.

Meanwhile, the 49ers moved closer to a playoff berth. They began the day needing a win, plus an Arizona loss combined with a loss or tie by Dallas or Philadelphia to clinch a spot with two weeks left in the regular season.

"This is when, as a team, you want to get good, this time of year. We're showing people that we're taking steps," Gore said. "We still haven't played our best game yet, and that's the scary part."

Tampa Bay closed within six points on Mike Glennon's TD pass to Tim Wright on the first play of the fourth quarter. The Bucs (4-10) didn't get the ball back until Kaepernick used 17 plays to move the 49ers 77 yards into position for Dawson to kick a 21-yard field goal that made it 23-14.

San Francisco 49ers quarterback Colin Kaepernick (7) celebrates with wide receiver Michael Crabtree (15) after Crabtree caught a 4-yard touchdown pass against the Tampa Bay Buccaneers during the first quarter of an NFL football game Sunday, Dec. 15, 2013, in Tampa, Fla. (Brian Blanco, Associated Press)

Kaepernick completed 19 of 29 passes for 203 yards, two touchdowns and no interceptions. In addition to hurting Tampa Bay with his feet by running seven times for 39 yards, he threw TD passes of 4 yards to Crabtree and 52 yards to Davis, who finished with five receptions for 79 yards.

Glennon was 18 of 34 for 179 yards, two touchdowns and one interception. But the Bucs only managed 39 yards rushing and were limited to a season-low 183 total net yards.

Vincent Jackson scored on an 11-yard reception to trim a 17-0 deficit to 10 points just before halftime. Glennon's 24-yard pass to Wright finished a 10-play, 92-yard drive that gave Tampa Bay hopes of pulling an upset.

But the Niners would have none of it.

Kaepernick kept San Francisco's long fourth-quarter march going with a 12-yard pass to Crabtree on third-and-12, then scrambled for 10 yards on third-and-6 for a first down at the Bucs 19. The drive eventually stalled at the 3, where the 49ers settled for Dawson's kick.

Eric Page fielded the ensuing kickoff, started up one side before heading across the field where he attempted to hand the ball to Russell Shepard on a reverse. Shepard lost the ball as he slipped to the ground, and Hunter made a nice to play to scoop it up on the run and score for a 30-14 lead.

Crabtree's return from a torn right Achilles tendon that sidelined him the first 11 games of the season has given San Francisco's offense, last in the league passing yardage, a lift. The speedy receiver averaged 18 yards per reception in his first two games back and had five catches for 45 yards, including his first quarter TD on Sunday.

Kaepernick set up the first score of the game with a couple of nifty third-down conversions, scrambling for 17 yards on third-and-8 on one and throwing 5 yards to Bruce Miller on third-and-3 on the other.

"''Kaepernick really put on his cape. A couple of those conversions ... there's not a lot of people that can make those kind of plays that he was making with his feet, his arm and with his head," 49ers coach Jim Harbaugh said. "Who's able to do that that's playing in this league? Very few guys."